| Abstrakt: |
A new organic donor, viz. benzo[1,2-g:4,5-g¤]bis(seleno- [2,3-b][1,4]dithiin) (BEDT-BDS), which is a selenium analog of the parent benzo[1,2-g:4,5-g¤]bis(thieno[2,3-b][1,4]dithiin), has been synthesized. The degree of “zigzag-N-shaped” molecular bending of BEDT-BDS, which is caused by the selenium substitution, is greater than that of BEDT-BDT. The N-shaped molecular bending in a radical-cation salt (BEDT-BDS)PF6 changes the S£S contact distances between the stacked molecules, and thus, a quasi-one-dimensional electronic structure is formed. According to the compositional formula and temperature dependence of resistivity, the PF6 salt is revealed to be a half-filled Mott insulator. [ABSTRACT FROM AUTHOR] |
